diff mbox series

[3/4] net/iavf: fix AVX-512 pointer copy on 32-bit

Message ID 20240906141127.628873-4-bruce.richardson@intel.com (mailing list archive)
State Accepted
Delegated to: Bruce Richardson
Headers
Series fix issues with using AVX-512 drivers on 32-bit |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Bruce Richardson Sept. 6, 2024, 2:11 p.m. UTC 
The size of a pointer on 32-bit is only 4 rather than 8 bytes, so
copying 32 pointers only requires half the number of AVX-512 load store
operations.

Fixes: 9ab9514c150e ("net/iavf: enable AVX512 for Tx")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/iavf/iavf_rxtx_vec_avx512.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/iavf/iavf_rxtx_vec_avx512.c b/drivers/net/iavf/iavf_rxtx_vec_avx512.c
index 3bb6f305df..d6a861bf80 100644
--- a/drivers/net/iavf/iavf_rxtx_vec_avx512.c
+++ b/drivers/net/iavf/iavf_rxtx_vec_avx512.c
@@ -1892,6 +1892,7 @@  iavf_tx_free_bufs_avx512(struct iavf_tx_queue *txq)
 		uint32_t copied = 0;
 		/* n is multiple of 32 */
 		while (copied < n) {
+#ifdef RTE_ARCH_64
 			const __m512i a = _mm512_loadu_si512(&txep[copied]);
 			const __m512i b = _mm512_loadu_si512(&txep[copied + 8]);
 			const __m512i c = _mm512_loadu_si512(&txep[copied + 16]);
@@ -1901,6 +1902,12 @@  iavf_tx_free_bufs_avx512(struct iavf_tx_queue *txq)
 			_mm512_storeu_si512(&cache_objs[copied + 8], b);
 			_mm512_storeu_si512(&cache_objs[copied + 16], c);
 			_mm512_storeu_si512(&cache_objs[copied + 24], d);
+#else
+			const __m512i a = _mm512_loadu_si512(&txep[copied]);
+			const __m512i b = _mm512_loadu_si512(&txep[copied + 16]);
+			_mm512_storeu_si512(&cache_objs[copied], a);
+			_mm512_storeu_si512(&cache_objs[copied + 16], b);
+#endif
 			copied += 32;
 		}
 		cache->len += n;